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Contaetha na hÉireann as Gaeilge · Irish forms from Logainm.ie
| County | As Gaeilge | Meaning | Province |
|---|---|---|---|
| Antrim | Aontroim | lone ridge | Ulster (Cúige Uladh) |
| Armagh | Ard Mhacha | Macha's height | Ulster (Cúige Uladh) |
| Carlow | Ceatharlach | four lakes | Leinster (Cúige Laighean) |
| Cavan | An Cabhán | the hollow | Ulster (Cúige Uladh) |
| Clare | An Clár | the plain, or the board | Munster (Cúige Mumhan) |
| Cork | Corcaigh | marsh | Munster (Cúige Mumhan) |
| Donegal | Dún na nGall | fort of the foreigners | Ulster (Cúige Uladh) |
| Down | An Dún | the fort | Ulster (Cúige Uladh) |
| Dublin | Baile Átha Cliath | town of the hurdled ford | Leinster (Cúige Laighean) |
| Fermanagh | Fear Manach | men of Manach | Ulster (Cúige Uladh) |
| Galway | Gaillimh | stony — the river Gaillimh | Connacht (Cúige Chonnacht) |
| Kerry | Ciarraí | the people of Ciar | Munster (Cúige Mumhan) |
| Kildare | Cill Dara | church of the oak | Leinster (Cúige Laighean) |
| Kilkenny | Cill Chainnigh | church of Cainneach | Leinster (Cúige Laighean) |
| Laois | Laois | the Loígis people | Leinster (Cúige Laighean) |
| Leitrim | Liatroim | grey ridge | Connacht (Cúige Chonnacht) |
| Limerick | Luimneach | bare spot, or bare marsh | Munster (Cúige Mumhan) |
| Derry / Londonderry | Doire | oak grove | Ulster (Cúige Uladh) |
| Longford | An Longfort | the fortress | Leinster (Cúige Laighean) |
| Louth | Lú | traditionally linked to the god Lugh | Leinster (Cúige Laighean) |
| Mayo | Maigh Eo | plain of the yew trees | Connacht (Cúige Chonnacht) |
| Meath | An Mhí | the middle | Leinster (Cúige Laighean) |
| Monaghan | Muineachán | place of little thickets | Ulster (Cúige Uladh) |
| Offaly | Uíbh Fhailí | the people of Failghe | Leinster (Cúige Laighean) |
| Roscommon | Ros Comáin | St Comán's wood | Connacht (Cúige Chonnacht) |
| Sligo | Sligeach | shelly place | Connacht (Cúige Chonnacht) |
| Tipperary | Tiobraid Árann | well of the Ara | Munster (Cúige Mumhan) |
| Tyrone | Tír Eoghain | land of Eoghan | Ulster (Cúige Uladh) |
| Waterford | Port Láirge | Lárag's landing place | Munster (Cúige Mumhan) |
| Westmeath | An Iarmhí | the west of Meath | Leinster (Cúige Laighean) |
| Wexford | Loch Garman | Garman's lake | Leinster (Cúige Laighean) |
| Wicklow | Cill Mhantáin | church of the toothless one | Leinster (Cúige Laighean) |
Sources: Logainm.ie, the Placenames Database of Ireland; Wikipedia county articles; P. W. Joyce. Full notes and audio: myireland.ie/counties/in-irish/